Citizens Advice said some home insurance providers do not always fully comply with rules requiring firms to state the past year’s premium at renewal.

James Bridge, head of conduct regulation at the Association of British Insurers (ABI), said: “Many customers benefit from shopping around to get the right policy for their needs at the best price, taking advantage of what are in effect introductory discounts.

“We recognise, however, that in a competitive market, those that don’t shop around may not always get the best deal.

“This is why we pushed for the new rules on renewal notices displaying both the existing and new premium to prompt customers, including the over-65s, to think about shopping around.

“The FCA (Financial Conduct Authority) has identified that some firms have had implementation challenges with the new rules and we would expect them to work with the regulator to put them right.”